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What is opacity?

opacity

 [oh-pas-i-tee]   Example Sentences Origin

o·pac·i·ty

   [oh-pas-i-tee]
noun, plural o·pac·i·ties.
1.
the state or quality of being opaque.
2.
something opaque.
3.
the degree to which a substance is opaque; capacity for being opaque.
4.
Photography. the proportion of the light that is absorbed by the emulsion on any given area of a film or plate.
5.
obscurity of meaning.
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6.
mental dullness.
7.
Medicine/Medical. an opaque spot or area in normally clear or transparent tissue, as a cataract of the eye.
COLLAPSE
Origin:
1550–60; < Latin opācitās shade. See opaque, -ity

Related forms
non·o·pac·i·ty, noun, plural non·o·pac·i·ties.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To opacity

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Opacity is always a great word to know.
So is take-up reel. Does it mean:
the reel on a projector onto which the film is wound after it has been projected
an additional crew used at a second location for filming crowd scenes and other shots that do not require the principal actors
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
Example Sentences
  • She respects her interlocutors' right to opacity while affirming the importance of their stories.
  • But that same opacity doesn't translate well to corporate governance.
  • Medical care is often priced with the same maddening, arbitrary opacity as airline seats and hotel rooms.
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Collins
World English Dictionary
opacity (əʊˈpæsɪtɪ)
 
—n , pl -ties
1.  the state or quality of being opaque
2.  the degree to which something is opaque
3.  an opaque object or substance
4.  obscurity of meaning; unintelligibility
5.  physics, photog the ratio of the intensity of light incident on a medium, such as a photographic film, to that transmitted through the medium
6.  logic, philosophy the property of being an opaque context

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

opacity
1560, "darkness of meaning, obscurity," from Fr. opacité, from L. opacitatem (nom. opacitas) "shade, shadiness," from opacus "shaded, dark, opaque." The lit. sense "condition of being impervious to light" first recorded 1634.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

opacity o·pac·i·ty (ō-pās'ĭ-tē)
n.

  1. The quality or state of being opaque.

  2. An opaque or nontransparent area, as of the cornea.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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